[SPARK-48312] Improve Alias.removeNonInheritableMetadata performance

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0.0
• Fix Version/s: 4.0.0
• Component/s: SQL
• Labels: pull-request-available
• Assignee: Vladimir Golubev
• Reporter: Vladimir Golubev
• Created: 16/May/24 15:30
• Updated: 17/May/24 12:36
• Resolved: 17/May/24 12:36

Description

`Alias.removeNonInheritableMetadata(...)` uses `MetadataBuilder`, which does expensive map manipulation (allocation, ++, remove). When `removeNonInheritableMetadata` is frequently called (e.g. wide VIEWs with many Aliases), it significantly slows down the code.

Issue Links

• links to: GitHub Pull Request #46622